Noise Assessment Report · MCU18/0019

Aged Care Facility, Noosaville



4 Predicted Noise Levels and Recommendations for Attenuation

                     4.1     Road Traffic Noise
                     The CoRTN algorithm for predicting road traffic noise implemented in the PEN3D
                     software package was used to model road traffic noise levels at the site.
                     Traffic volumes for Goodchap Street for the present year and 10 years post-
                     construction (2028) were based on peak hour traffic counts carried out at the Site
                     in 2015 by austraffic.
                     Traffic volumes are shown in Table 7.
                     Table 7     Road Traffic Volumes on Goodchap Street, Buderim

                                                                   Average
                     Road               Direction      Year        Count            % Heavy Vehicles
                     Goodchap Street    Both           2017        9,500            2
                     Goodchap Street    Both           2027        10,600           2

                     Road surfaces are DGA. Average vehicle speed was assumed to be the posted
                     speed limit of 60 kph.
                     The present-day scenario was modelled to verify the logger-measured noise
                     levels. The model-calculated noise level of 63.8 dB LA10(18 hour) was within an
                     acceptable margin of the measured noise level (see Table 3), and is slightly
                     conservative.
                     Road traffic noise levels were calculated for the planning horizon year (2028) at all
                     rooms facing Goodchap St, and results are provided in Appendix C. A screenshot
                     of the model layout is shown in Figure 6.




                     Figure 6    Road Traffic Noise Model Layout

1121R1-R0                                             13 December 2017                                    Page 7 of 10